18-CD30D1-20-EN
49
Installer’s Guide
STAND ALONE OPERATION (CONTINGENCY MODE)
The Contingency Mode allows the installer to set the
equipment to operate in an ON/ OFF Duty Cycle mode.
This mode will be activated using the User Interface.
Contingency Mode is NOT available in 24VAC mode.
The user will select the desired level of capacity required,
Stage 1 (40%) or 2 (100%). The user will select the
desired ON/ OFF Duty Cycle, 10% minimum to 50%
maximum, (10% increments, 10% = 2 minutes On, 18
minutes Off; 50% = 10 minutes on, 10 minutes off).
CONTINGENCY MODE
Note:
Stage 1 = 40% (low) heat, Stage 2 = 100% (high) heat
Note:
If a communicating comfort control is detected to be
present and the contingency mode is selected, NOT
AVAILABLE will be displayed on the User Interface.
• Stand alone operation can only be entered at the user
interface.
• Stand alone operation can be set up to operate the furnace
in
Heating Only.
• The contingency mode is used when the communicating
comfort Control is not communicating with the furnace or
when setting gas manifold pressures.
• Before attempting to enter contingency mode, disconnect
the Data wire "D" from the furnace IFC terminal block.
• The contingency mode will function only when the
furnace IFC is not flashing a fault code at its Fault
LED.
• To enter the contingency mode of operation, turn 115
VAC power off. When the Green LED on the variable
speed inducer drive goes out, turn 115 VAC power
back on.
• Scroll down using the down arrow
at the User Interface
until you see
CNTNGNCY Mode
, then press the
Enter
button.
•
CNTNGNCY MODE
and
STAGE
will now be displayed.
Press the
Enter
button.
•
STAGE
and
OFF [OFF]
will now be displayed. First or
Second heat stage
must
be selected. Use the
or
arrows to select the stage of heat wanted and then push
the
Enter
button and then the
button.
•
DUTY CYCLE
and
10% [10%]
will now be displayed.
A duty cycle
must
now be selected from 10 to 50%. A
10% duty cycle will run the furnace for 2 minutes and
then off for 18 minutes. A 50% duty cycle will run the
furnace for 10 minutes and then be off for 10 minutes.
These duty cycles will be repeated 3 times per hour.
Use the
or
arrows to select a duty cycle and then
push the
Enter
button and then the
button.
•
Start
and
NO
[NO]
will now be displayed. With a
NO/NO
question being asked, use the
or
arrows to select
TABLE 22
furnace
Input rate
(KBTU/hr)
FINAL LP MANIFOLD PRESSURE SETTINGS (inches w.c.)
40%
65%
100%
60
2.1 ± 0.5
Not Adjustable
10.0 ± 0.5
80
2.1 ± 0.5
Not Adjustable
10.0 ± 0.5
100
2.1 ± 0.5
Not Adjustable
10.0 ± 0.5
Downflow
120
2.1 ± 0.5
Not Adjustable
10.0 ± 0.5
Upflow 120
2.9 ± 0.5
Not Adjustable
10.0 ± 0.5
For upflow 120KBTU/hr model, 1st stage is 45%
Manifold pressures apply for Propane applications ONLY
furnace
Input rate
(KBTU/hr)
FINAL NG MANIFOLD PRESSURE SETTINGS (inches w.c.)
40%
65%
100%
60
0.7 + 0.2 / - 0.0
Not Adjustable
3.5 ± 0.2
80
0.7 + 0.2 / - 0.0
Not Adjustable
3.5 ± 0.2
100
0.7 + 0.2 / - 0.0
Not Adjustable
3.5 ± 0.2
Downflow
120
0.7 + 0.2 / - 0.0
Not Adjustable
3.5 ± 0.2
Upflow
120
0.9 + 0.2 / - 0.0
Not Adjustable
3.5 ± 0.2
For upflow 120KBTU/hr model, 1st stage is 45%
Manifold pressures apply for Natural Gas applications ONLY
PERSONALITY MODULE
The Personality Module is a removable memory device,
on which is stored model specific data required for proper
furnace operation. The Personality Module is tethered to
the unit and must remain with the furnace at all times. The
Personality module must remain plugged into the furnace
IFC.